The angular-aria keyboard manager ignores the event.repeat parameter so holding down a key will cause it to loop even when that behavior is not desired. In general, repeated events should only be handled when navigating with arrow keys, and especially not when toggling (as then it just goes from off to on to off and so on).

Another issue is that the browser can interpret a keyboard space or enter as a click in certain cases. This is true with the toolbar so added check for a proper mouse event to handle the click (else already handled with keyboard) as well as updated spec to pass a proper event.

Note: we are missing tests for this but they probably need to be added at a higher level so that we can catch for not just the repeat issue but also issues like the click above. Else can just add explicit repeat but keyDown events but that isn't as useful.

Fixes b/479281429.